Bigjaycass

I am switching to a 700r4 in my 95 Z28. Was wondering if I could us a lock up converter or do I need to run a non lock ? I am going with like a 2000 stall but need to see which is recommended . Thanks for any help.

96capricemgr

are you willing to do this right or do you really want a 700R4 and 2000 stall?

I believe the stock converter in an f-body is about 1800 and as long as you got a 30spline 700R4 it would work.

Really though both 700R4 and 2000 stall are both terrible choices.

Bigjaycass

Well I like the 700r4 better than the 4L60E. I don't know if the guy before me messed up wiring or if it is the tranny but 2 bad ones in a row. Should I go with a bit bigger stall?

96capricemgr

The 4L60E has a lot of internal upgrades over the 700R4 just from things being improved as weaknesses were revealed and power levels increased.

Why not figure out why you are having problems? My tanny is pusing 9 years old and was built with under 400fwhp in mind and it has been abused by 390+rwhp for over 6 years now and all my tranny guy had me do to accommodate the power increase was redrill the 1-2 feed hole larger. There are a LOT of second rate hacks out there who don't understand the 700R4/4L60E but are very happy to take your money. I made that mistake once too before getting someone good to built a tranny for me.

Far as stall, for performance use I would do nothing less than a 9.5" 2800 stall Edge, Yank, Vigilante, maybe consider Circle D or a few others but Edge is the cheapest I would use and is actually what I do use. The others use billet covers and cost more because of it so Edge is the "budget" one and is still over $500, anything cheaper in 9.5" and the results are mixed at best.
I know 2800 stall sounds like a lot but modern converters are not like old times, they drive well and cool, lockup makes them disapear entirely at cruise.

Far as what it takes to build a 4L60E a LOT of it is clearances and shift kit setup, my tranny has stock servos, some stock clutches, stock planeteries, stock sunshell. The tranny guy has urged me to pull it apart and put a sleeve on the input and a cryo'd output shaft on but it is holding fine with low 1.5s at over 4100lbs. At almost 9 years old built for a lot less power if it blewup tomorrow I would still be happy.

If your local guy can't do the job consider someone like ProBuilt Automatics in CA which is who did mine, Rossler has the fastest most extreme application of a 4L60E I know of, a low 9 second 4400lbs Impala running high 150s MPH he is I think in Indiana, FLP is in IL. I am pretty sure all these guys have 4L60E in 9 second cars. If you are considering a 2000stall you have what a 13 second car. Absolutely no reason to step back to a 700R4 especially when it will need some updates from a 4L60E anyway.

Again it is not the parts that go into it, it is much more the guy who takes the time to build it right, a friend bought the same rebuild kit I used but had it built locally instead of by ProBuilt and spent a whole summer having the car towed back to the shop ever few hundred miles because it kept breaking, and his car made less power than mine and was a third gen f-body so it was about 600lbs lighter. Same parts, bad builder he got a few weeks, I got 8.5+ years and counting behind more power in a heavier car.